Chestnut – eGPU dock with open-source firmware

Re:Chestnut – eGPU dock with open-source firmware by bellowsgulch on Sunday August 16, 2026 @09:18AM (#49319793)

Two things: 1. they have a cheap fuse (cents on the dollar) that’s not automotive-grade so your windshield mounted device fails in hot weather and doesn’t last past the hardware warranty. Known issue, doubt they ever fixed it.

2. 1B parameter model to stay between two lines. Why. Waste of time. Their product hasn’t actually changed in several years because they will never advance past lane keeping SAE Level 2.

I suspect for what they’re selling for $1,000+ these days, could you find a way to do for half? Less than that?

I mean after all, it still runs off a Snapdragon 845.

Nice tech, disappointing limitations and too expensive. The world moved on, Tesla is bad but a Waymo competitor would be more serious than this.

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Re:Chestnut – eGPU dock with open-source firmware by mft_ on Sunday August 16, 2026 @10:08AM (#49320236)

> 2. 1B parameter model to stay between two lines. Why. Waste of time. Their product hasn’t actually changed in several years because they will never advance past lane keeping SAE Level 2.

Maybe... you're answering your own question there?

> I suspect for what they’re selling for $1,000+ these days, could you find a way to do for half? Less than that?

Genuine question: does anyone else anywhere sell something like this? An all-in-one retrofitable level 2 self-driving gadget?

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Re:Chestnut – eGPU dock with open-source firmware by Yossarrian22 on Sunday August 16, 2026 @11:03AM (#49320762)

There are clone devices but nothing else I’m aware of

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Re:Chestnut – eGPU dock with open-source firmware by dermacentor on Sunday August 16, 2026 @01:50PM (#49322113)

You're not paying $1,000 for a cut down Android when you buy a Comma Four.

What you're buying is an entry ticket to Comma-land — where dozens of car models are supported, pre-made harnesses are just a buy button away, and everything is open source.

If George had chosen to go the closed source route, you might be paying $200 for a locked-down device and $200 every month for a mandatory subscription.

Which one makes you feel better? Comma as a business needs to be able to pay their employees.

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Re:Chestnut – eGPU dock with open-source firmware by hypfer on Sunday August 16, 2026 @04:27PM (#49323346)

Comma-land?

Comma on, man.

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Re:Chestnut – eGPU dock with open-source firmware by bellowsgulch on Monday August 17, 2026 @04:28PM (#49337158)

I want them to improve the product meaningfully beyond lane keeping, which besides lane changing (partially), it's the only thing it's capable of because they willingly choose not to extend the system to use more visibility.

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Re:Chestnut – eGPU dock with open-source firmware by dermacentor on Thursday August 27, 2026 @12:08PM (#49467124)

What is "more visibility"?

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Re:Chestnut – eGPU dock with open-source firmware by eikonoklastess on Tuesday August 18, 2026 @09:03PM (#49355212)

comma 4 was built from the ground up to avoid this problem. also they are building it in the us for about 500$ the 1000$ price tag isnt super unreasonable.

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